feat: add IOnClick event interface

Assets/Samples/EventInterfaces/EventInterfacesView.cs

@@ -6,7 +6,7 @@ namespace UIComponents.Samples.EventInterfaces
     [Dependency(typeof(IEventLogService), provide: typeof(EventLogService))]
     public class EventInterfacesView : UIComponent,
         IOnAttachToPanel, IOnGeometryChanged, IOnDetachFromPanel,
-        IOnMouseLeave, IOnMouseEnter
+        IOnMouseLeave, IOnMouseEnter, IOnClick
     {
         private readonly IEventLogService _eventLogService;
 
@@ -49,6 +49,11 @@ public void OnMouseLeave(MouseLeaveEvent evt)
             _eventLogService.Log(evt);
         }
 
+        public void OnClick(ClickEvent evt)
+        {
+            _eventLogService.Log(evt);
+        }
+
         private void OnClearButtonClicked()
         {
             _eventLogService.Clear();

Assets/UIComponents.Tests/Editor/Interfaces/UIComponentInterfaceTests.cs

@@ -83,5 +83,16 @@ public void IOnMouseLeave_Registers_MouseLeaveEvent_Callback()
         {
             Assert_Registers_Event_Callback<UIComponentWithOnMouseLeave, MouseLeaveEvent>();
         }
+
+        private class UIComponentWithOnClick : BaseTestComponent, IOnClick
+        {
+            public void OnClick(ClickEvent evt) => Fired = true;
+        }
+
+        [Test]
+        public void IOnClick_Registers_ClickEvent_Callback()
+        {
+            Assert_Registers_Event_Callback<UIComponentWithOnClick, ClickEvent>();
+        }
     }
 }

Assets/UIComponents/Core/EventInterfaces/IOnClick.cs

@@ -0,0 +1,14 @@
+using UnityEngine.UIElements;
+
+namespace UIComponents
+{
+    /// <summary>
+    /// When implemented by a <see cref="UIComponent"/>,
+    /// a callback for <see cref="ClickEvent"/> is
+    /// automatically registered in the UIComponent constructor.
+    /// </summary>
+    public interface IOnClick
+    {
+        void OnClick(ClickEvent evt);
+    }
+}

Assets/UIComponents/Core/UIComponent.cs

@@ -103,6 +103,9 @@ private void RegisterEventInterfaceCallbacks()
 
             if (this is IOnMouseLeave onMouseLeave)
                 RegisterCallback<MouseLeaveEvent>(onMouseLeave.OnMouseLeave);
+
+            if (this is IOnClick onClick)
+                RegisterCallback<ClickEvent>(onClick.OnClick);
         }
 
         /// <summary>

README.md

@@ -156,14 +156,16 @@ The interfaces are:
 - `IOnGeometryChanged` for `GeometryChangedEvent`
 - `IOnMouseEnter` for `MouseEnterEvent`
 - `IOnMouseLeave` for `MouseLeaveEvent`
+- `IOnClick` for `ClickEvent`
 
 ```c#
 public class ComponentWithCallbacks : UIComponent,
     IOnAttachToPanel,
     IOnGeometryChanged,
     IOnDetachFromPanel,
     IOnMouseEnter,
-    IOnMouseLeave
+    IOnMouseLeave,
+    IOnClick
 {
     public void OnAttachToPanel(AttachToPanelEvent evt)
     {
@@ -190,6 +192,11 @@ public class ComponentWithCallbacks : UIComponent,
     {
         Debug.Log("Bye mouse");
     }
+
+    public void OnClick(ClickEvent evt)
+    {
+        Debug.Log("Clicked!");
+    }
 }
 ```